PCB (Printed Circuit Board) welding spot defect detection device

Abstract

The utility model provides a PCB (printed circuit board) welding spot defect detection device which comprises a machine tool, a driving assembly arranged in the machine tool, a moving assembly arranged in the machine tool and comprising a moving seat and a rack, a circuit board movably mounted at the top of the moving seat, a radiation cleaning assembly arranged in the machine tool, and a control assembly arranged in the radiation cleaning assembly. The radiation cleaning assembly is arranged on the surface of the connecting cover, the sealing assembly is arranged in the machine tool, and the second transmission assembly is arranged in the machine tool. According to the PCB welding spot defect detection device provided by the utility model, the circuit board is placed on the moving seat, the driving assembly drives the moving assembly to the bottom of the detector to detect the circuit board, and after detection is finished, the rotating threaded rod is rotated through transmission of the first transmission assembly and the second transmission assembly, so that the sealing plate is opened and closed, and the detection efficiency is improved. And when the circuit board moves into the radiation cleaning assembly, radiation on the surface of the circuit board can be cleaned, and the radiation is prevented from hurting workers.

Description

Technical Field

[0001] This utility model relates to the field of PCB circuit board testing technology, and in particular to a device for detecting solder joint defects in PCB circuit boards. Background Technology

[0002] PCB, or Printed Circuit Board, is an important electronic component. It serves as the support for electronic components and the carrier for their electrical interconnections. Because it is manufactured using electronic printing techniques, it is called a "printed" circuit board.

[0003] X-ray inspection equipment utilizes the ability of X-rays to penetrate materials to perform internal inspections on PCB boards. After X-rays penetrate the PCB board, they form an image on an imaging board. The quality of the solder joints is judged based on information such as the shape and density of the solder joints in the image. However, X-rays pose a certain radiation hazard to the human body, and improper protective measures during use can easily cause harm.

[0004] Therefore, it is necessary to provide a PCB circuit board solder joint defect detection device to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a PCB circuit board solder joint defect detection device, which solves the problem of inadequate protective measures in existing X-ray inspection equipment.

[0006] To solve the above-mentioned technical problems, the PCB circuit board solder joint defect detection device provided by this utility model includes: a machine tool, wherein the machine tool is provided with a drive assembly, and the drive assembly includes a drive threaded rod and a drive motor;

[0007] A movable component, disposed inside the machine tool, the movable component including a movable base and a rack;

[0008] A circuit board, which is movably mounted on top of the movable base;

[0009] A radiation cleaning assembly is disposed inside the machine tool. The radiation cleaning assembly includes a connecting cover, which is fixedly connected to the inner surface of the machine tool. A roller is movably installed on the inner surface of the connecting cover. A fan is fixedly installed on the top of the connecting cover. A dust collection box is fixedly installed on the top of the machine tool.

[0010] The first transmission assembly, wherein the radiation cleaning assembly is disposed on the surface of the connecting cover, includes a first meshing gear, a transmission rod, and a first transmission belt;

[0011] A sealing assembly, disposed inside the machine tool, the sealing assembly including a partition, a rotating threaded rod and a sealing plate;

[0012] The second transmission assembly is disposed inside the machine tool and includes a first transmission gear, a second transmission gear, a second transmission belt, and a second meshing gear.

[0013] A detector, which is fixedly installed inside the machine tool.

[0014] Preferably, the drive threaded rod is movably connected inside the machine tool, and the drive motor is fixedly connected to one end of the drive threaded rod.

[0015] Preferably, the bottom of the movable seat is threadedly connected to the outer surface of the drive threaded rod, and the rack is fixedly connected to one end of the movable seat.

[0016] Preferably, the first meshing gear is movably mounted inside the connecting cover, the transmission rod is fixedly connected to the top of the first meshing gear, and the first transmission belt is fixedly connected to the top of the transmission rod.

[0017] Preferably, the partition is fixedly connected inside the machine tool, the rotating threaded rod is movably connected inside the partition, the other end of the first transmission belt is fixedly connected to the top of the rotating threaded rod, and the sealing plate is movably installed inside the partition.

[0018] Preferably, the first transmission gear is fixedly connected to the bottom of the rotating threaded rod, the second transmission gear is movably connected to the surface of the first transmission gear, the second transmission belt is fixedly connected to the top of the second transmission gear, and the second meshing gear is fixedly connected to the other end of the second transmission belt.

[0019] Preferably, the surface of the movable seat is provided with a clamping assembly, the clamping assembly including a movable groove, the movable groove being formed inside the movable seat, a bidirectional electric telescopic rod being movably installed inside the movable groove, clamping plates being fixedly connected to both ends of the bidirectional electric telescopic rod, and the clamping plates being fixedly connected to both ends of the circuit board.

[0020] Compared with related technologies, the PCB circuit board solder joint defect detection device provided by this utility model has the following beneficial effects:

[0021] This utility model provides a PCB circuit board solder joint defect detection device. By placing the circuit board on the moving base, the driving component drives the moving component to the bottom of the detector to detect the circuit board. After the detection is completed, the first transmission component and the second transmission component drive the rotating threaded rod to rotate, thereby opening and closing the sealing plate. The circuit board moves into the interior of the radiation cleaning component, which can remove the radiation on the surface of the circuit board and prevent radiation from causing harm to the workers. Attached Figure Description

[0022] Figure 1 A schematic diagram of the first embodiment of the PCB circuit board solder joint defect detection device provided by this utility model;

[0023] Figure 2 for Figure 1 The diagram shows the internal structure of the front side of the machine tool.

[0024] Figure 3 for Figure 1 The diagram shows the internal structure of the rear side of the machine tool.

[0025] Figure 4 for Figure 2 The enlarged schematic diagram of part A shown below;

[0026] Figure 5 for Figure 3 The enlarged schematic diagram of section B is shown below;

[0027] Figure 6 A schematic diagram of the second embodiment of the PCB circuit board solder joint defect detection device provided by this utility model;

[0028] Figure 7 for Figure 6 The diagram shows the connection structure between the interior of the movable seat and the clamping assembly.

[0029] Labels in the diagram: 1. Machine tool

[0030] 2. Drive assembly, 21. Drive threaded rod, 22. Drive motor,

[0031] 3. Moving component; 31. Moving base; 32. Rack and pinion.

[0032] 4. Circuit board,

[0033] 5. Radiation cleaning components; 51. Connecting cover; 52. Roller; 53. Fan; 54. Dust collection box.

[0034] 6. First transmission assembly; 61. First meshing gear; 62. Transmission rod; 63. First transmission belt; 7. Sealing assembly; 71. Partition plate; 72. Rotating threaded rod; 73. Sealing plate.

[0035] 8. Second transmission assembly; 81. First transmission gear; 82. Second transmission gear; 83. Second transmission belt; 84. Second meshing gear.

[0036] 9. Detector

[0037] 10. Clamping assembly; 101. Moving slot; 102. Bidirectional electric telescopic rod; 103. Clamping plate. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] First Embodiment

[0040] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic diagram of the first embodiment of the PCB circuit board solder joint defect detection device provided by this utility model; Figure 2 for Figure 1 The diagram shows the internal structure of the front side of the machine tool. Figure 3 for Figure 1 The diagram shows the internal structure of the rear side of the machine tool. Figure 4 for Figure 2 The enlarged schematic diagram of part A shown below; Figure 5 for Figure 3 The enlarged schematic diagram of section B is shown. The PCB circuit board solder joint defect detection device includes: a machine tool 1, wherein the machine tool 1 is internally equipped with a drive assembly 2, and the drive assembly 2 includes a drive threaded rod 21 and a drive motor 22;

[0041] The moving component 3 is disposed inside the machine tool 1, and the moving component 3 includes a moving base 31 and a rack 32;

[0042] Circuit board 4, which is movably mounted on the top of the movable base 31;

[0043] Radiation cleaning component 5 is disposed inside the machine tool 1. The radiation cleaning component 5 includes a connecting cover 51, which is fixedly connected to the inner surface of the machine tool 1. A roller 52 is movably installed on the inner surface of the connecting cover 51. A fan 53 is fixedly installed on the top of the connecting cover 51. A dust collection box 54 is fixedly installed on the top of the machine tool 1.

[0044] The first transmission assembly 6, the radiation cleaning assembly 5 is disposed on the surface of the connecting cover 51, the first transmission assembly 6 includes a first meshing gear 61, a transmission rod 62 and a first transmission belt 63;

[0045] A sealing assembly 7 is disposed inside the machine tool 1, and the sealing assembly 7 includes a partition 71, a rotating threaded rod 72, and a sealing plate 73;

[0046] The second transmission assembly 8 is disposed inside the machine tool 1. The second transmission assembly 8 includes a first transmission gear 81, a second transmission gear 82, a second transmission belt 83, and a second meshing gear 84.

[0047] Detector 9 is fixedly installed inside the machine tool 1.

[0048] The front end of the machine tool 1 is equipped with a protective door, which can be opened to place the circuit board 4 inside the machine tool 1. Closing the door provides sealing protection. Glass windows are fixedly installed on the left and right sides near the rear end of the machine tool 1, allowing staff to easily observe the internal testing process. The drive component 2 drives the moving component 3 to move, which in turn moves the circuit board 4. The radiation cleaning component 5 cleans the radiation from the surface of the circuit board 4. The connecting cover 51 is U-shaped and fixedly connected to the inner surface of the machine tool 1 near the bottom of the front end. The fan 53 is fixedly installed on the inner surface of the top and bottom of the connecting cover 51. The connecting cover 51 is connected to the dust collection box 54 through a pipe. The fan 53 can suck dust into the body and discharge it into the dust collection box 54 through the connecting pipe. The first transmission component 6 is for transmission. The sealing component 7 is opened and closed through the transmission of the first transmission component 6 and the second transmission component 8. The detector 9 forms an image on the imaging board after X-rays penetrate the PCB board. The quality of the solder joints is judged based on the shape, density, and other information of the solder joints in the image.

[0049] The drive threaded rod 21 is movably connected inside the machine tool 1, and the drive motor 22 is fixedly connected to one end of the drive threaded rod 21.

[0050] A groove is formed at the bottom of the inner surface of the machine tool 1. The drive threaded rod 21 is rotatably connected inside the groove. The drive motor 22 is fixedly connected to the rear end of the drive threaded rod 21 and is fixedly installed on the outer surface of the rear end of the machine tool 1. However, when the drive motor 22 is started, it can drive the drive threaded rod 21 to rotate.

[0051] The bottom of the movable seat 31 is threadedly connected to the outer surface of the drive threaded rod 21, and the rack 32 is fixedly connected to one end of the movable seat 31.

[0052] A threaded block is fixedly connected to the bottom of the movable seat 31. The threaded block is threaded onto the outer surface of the drive threaded rod 21. When the drive threaded rod 21 rotates, the threaded block can drive the movable seat 31 to move back and forth. The rack 32 is arrayed and connected to the left end of the movable seat 31.

[0053] The first meshing gear 61 is movably mounted inside the connecting cover 51, the transmission rod 62 is fixedly connected to the top of the first meshing gear 61, and the first transmission belt 63 is fixedly connected to the top of the transmission rod 62.

[0054] The first meshing gear 61 is rotatably installed inside the left end of the connecting cover 51. When the moving seat 31 moves into the connecting cover 51, the rack 32 meshes with the first meshing gear 61, thereby realizing the rotation of the first meshing gear 61. The first transmission belt 63 is composed of a large and a small pulley connected by a belt meshing. The large pulley is fixedly connected to the top of the transmission rod 62, and the small pulley is fixedly connected to the top of the rotating threaded rod 72. When the first meshing gear 61 rotates, it drives the large pulley to rotate through the transmission rod 62. The large pulley then meshes with the belt, and the rotation of the belt and the small pulley realize the high-speed rotation of the small pulley.

[0055] The partition 71 is fixedly connected inside the machine tool 1, the rotating threaded rod 72 is movably connected inside the partition 71, the other end of the first transmission belt 63 is fixedly connected to the top of the rotating threaded rod 72, and the sealing plate 73 is movably installed inside the partition 71.

[0056] The partition 71 is fixedly connected to the rear end of the connecting cover 51 and divides the interior of the machine tool 1 into front and rear parts. The surface of the partition 71 has an opening, and the sealing plate 73 is slidably embedded in the opening. One end of the sealing plate 73 is fixedly connected to a threaded block, which is threadedly connected to the outer surface of the rotating threaded rod 72. When the first transmission belt 63 rotates, it can drive the rotating threaded rod 72 to rotate at high speed, thereby realizing the up and down movement of the sealing plate 73.

[0057] The first transmission gear 81 is fixedly connected to the bottom of the rotating threaded rod 72, the second transmission gear 82 is movably connected to the surface of the first transmission gear 81, the second transmission belt 83 is fixedly connected to the top of the second transmission gear 82, and the second meshing gear 84 is fixedly connected to the other end of the second transmission belt 83.

[0058] The second transmission gear 82 is slightly larger than the first transmission gear 81. The second transmission belt 83 consists of two pulleys connected by a belt. The two pulleys are fixedly connected to the top of the second transmission gear 82 and the second meshing gear 84, respectively. When the second meshing gear 84 meshes with the rack 32, the second meshing gear 84 rotates and drives the second transmission gear 82 to rotate through the second transmission belt 83. The second transmission gear 82 then meshes with the first transmission gear 81, and the first transmission gear 81 drives the rotating threaded rod 72 to rotate at high speed, thereby realizing the up and down movement of the sealing plate 73.

[0059] The working principle of the PCB circuit board solder joint defect detection device provided by this utility model is as follows:

[0060] First, place the circuit board 4 on the movable seat 31. Then, close the front door of the machine tool 1 and start the drive motor 22 to drive the drive threaded rod 21 to rotate. The movable seat 31 then moves the circuit board 4 to the rear end. When the movable seat 31 moves into the connecting cover 51, the first meshing gear 61 meshes with the rack 32 and drives the first transmission belt 63 to rotate through the transmission rod 62. The first transmission belt 63 then drives the rotating threaded rod 72 to rotate, and the sealing plate 73 moves upward. The partition 71 is gradually opened, and the movable seat 31 moves forward and moves out of the connecting cover 51 through the partition 71. At this time, the rack 32 no longer meshes with the first meshing gear 61 and meshes with the second meshing gear 84. The second meshing gear 84 then... The second transmission belt 83 drives the second transmission gear 82 to rotate, which in turn drives the first transmission gear 81 to rotate. The first transmission gear 81 then drives the rotating threaded rod 72 to move in the opposite direction, and the sealing plate 73 moves downward until the moving seat 31 is completely moved out of the interior of the connecting cover 51 and the sealing plate 73 is completely closed. Finally, the detector 9 is started to test the circuit board 4. After the test is completed, the drive motor 22 is started to reverse. The working principle is as above. The moving seat 31 moves into the interior of the connecting cover 51, and the roller 52 is connected to the surface of the circuit board 4 to wipe away the dust with radiation on the surface of the circuit board 4. The dust is sucked out by the dust collection box 54. After moving to the front end, the front door of the machine tool 1 is opened and the circuit board 4 is taken out.

[0061] Compared with related technologies, the PCB circuit board solder joint defect detection device provided by this utility model has the following beneficial effects:

[0062] This utility model provides a PCB circuit board solder joint defect detection device. By placing the circuit board 4 on the movable seat 31, the driving component 2 drives the moving component 3 to the bottom of the detector 9 to detect the circuit board 4. After the detection is completed, the first transmission component 6 and the second transmission component 8 drive the rotating threaded rod 72 to rotate, thereby opening and closing the sealing plate 73. The circuit board 4 moves into the interior of the radiation cleaning component 5, which can clean the radiation on the surface of the circuit board 4 and prevent radiation from causing harm to the workers.

[0063] Second Embodiment

[0064] Please refer to the following: Figure 6 and Figure 7 Based on the PCB circuit board solder joint defect detection device provided in the first embodiment of this application, the second embodiment of this application proposes another PCB circuit board solder joint defect detection device. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0065] Specifically, the difference in the PCB circuit board solder joint defect detection device provided in the second embodiment of this application is that the surface of the movable base 31 of the PCB circuit board solder joint defect detection device is provided with a clamping assembly 10. The clamping assembly 10 includes a movable groove 101, which is opened inside the movable base 31. A bidirectional electric telescopic rod 102 is movably installed inside the movable groove 101. The two ends of the bidirectional electric telescopic rod 102 are fixedly connected to clamping plates 103, and the clamping plates 103 are fixedly connected to the two ends of the circuit board 4.

[0066] The movable slot 101 is located at the center of the top of the movable base 31, and the top of the movable base 31 near the front and rear ends is fixedly connected to a slide rail. There are two clamping plates 103, and each of them is fixedly connected to a slider at the bottom. The two sliders are movably embedded in the movable slot 101 and are respectively fixedly connected to the left and right ends of the bidirectional electric telescopic rod 102. When the bidirectional electric telescopic rod 102 extends or retracts, the two clamping plates 103 can move towards each other and relative to each other to clamp and fix the circuit board 4.

[0067] The working principle of the PCB circuit board solder joint defect detection device provided by this utility model is as follows:

[0068] First, place the circuit board 4 between the two clamping plates 103, then start the bidirectional electric telescopic rod 102 to pull the two clamping plates 103 to move relative to each other until the two ends of the circuit board 4 are clamped.

[0069] Compared with related technologies, the PCB circuit board solder joint defect detection device provided by this utility model has the following beneficial effects:

[0070] This utility model provides a PCB circuit board solder joint defect detection device. The extension and retraction of the bidirectional electric telescopic rod 102 can drive the two clamping plates 103 to move relative to each other to clamp and fix the circuit board 4, thus ensuring the stability of the circuit board 4 during the detection process.

[0071] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A PCB circuit board solder joint defect detection device, characterized in that, include: A machine tool, wherein the machine tool is internally equipped with a drive assembly, the drive assembly including a drive threaded rod and a drive motor; A movable component, disposed inside the machine tool, the movable component including a movable base and a rack; A circuit board, which is movably mounted on top of the movable base; A radiation cleaning assembly is disposed inside the machine tool. The radiation cleaning assembly includes a connecting cover, which is fixedly connected to the inner surface of the machine tool. A roller is movably installed on the inner surface of the connecting cover. A fan is fixedly installed on the top of the connecting cover. A dust collection box is fixedly installed on the top of the machine tool. The first transmission assembly, wherein the radiation cleaning assembly is disposed on the surface of the connecting cover, includes a first meshing gear, a transmission rod, and a first transmission belt; A sealing assembly, disposed inside the machine tool, the sealing assembly including a partition, a rotating threaded rod and a sealing plate; The second transmission assembly is disposed inside the machine tool and includes a first transmission gear, a second transmission gear, a second transmission belt, and a second meshing gear. A detector, which is fixedly installed inside the machine tool.

2. The PCB circuit board solder joint defect detection device according to claim 1, characterized in that, The drive threaded rod is movably connected inside the machine tool, and the drive motor is fixedly connected to one end of the drive threaded rod.

3. The PCB circuit board solder joint defect detection device according to claim 1, characterized in that, The bottom of the movable seat is threadedly connected to the outer surface of the drive threaded rod, and the rack is fixedly connected to one end of the movable seat.

4. The PCB circuit board solder joint defect detection device according to claim 1, characterized in that, The first meshing gear is movably mounted inside the connecting cover, the transmission rod is fixedly connected to the top of the first meshing gear, and the first transmission belt is fixedly connected to the top of the transmission rod.

5. The PCB circuit board solder joint defect detection device according to claim 1, characterized in that, The partition is fixedly connected inside the machine tool, the rotating threaded rod is movably connected inside the partition, the other end of the first transmission belt is fixedly connected to the top of the rotating threaded rod, and the sealing plate is movably installed inside the partition.

6. The PCB circuit board solder joint defect detection device according to claim 1, characterized in that, The first transmission gear is fixedly connected to the bottom of the rotating threaded rod, the second transmission gear is movably connected to the surface of the first transmission gear, the second transmission belt is fixedly connected to the top of the second transmission gear, and the second meshing gear is fixedly connected to the other end of the second transmission belt.

7. The PCB circuit board solder joint defect detection device according to claim 1, characterized in that, The surface of the movable base is provided with a clamping assembly, the clamping assembly includes a movable groove, the movable groove is opened inside the movable base, a bidirectional electric telescopic rod is movably installed inside the movable groove, clamping plates are fixedly connected to both ends of the bidirectional electric telescopic rod, and the clamping plates are fixedly connected to both ends of the circuit board.

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